This list comprises the most famous unsolved mysteries known to man that really defy rational explanation or are just outright strange.

10. Rongorongo

Rongorongo is a system of glyphs discovered in the 19th century on Easter Island that appears to be writing or proto-writing. It cannot be read despite numerous attempts at decipherment. Although some calendarical and what might prove to be genealogical information has been identified, not even these glyphs can actually be read. If rongorongo does prove to be writing, it could be one of as few as three or four independent inventions of writing in human history.

9. The Bog-men

Scholars have long tried to make sense out of one of the oddities of the archaeological world — bodies pulled from ignominious burials in cold water bogs everywhere from Ireland to Russia . Hundreads of these bog bodies have been found over the past two centuries. But who were they and why were they dispatched to the great beyond in mucky swamps? The theories range from executed deserters, to witches to everyday people. Unlike most ancient human remains, bog bodies have retained their skin and internal organs due to the unusual conditions of the surrounding area.

8. Tarim Mummies - Out of Place

An amazing discovery of 2,000 year old Caucasian descent mummies in the Tarim basin of Western China occurred in the early 90s. But more amazing than the discovery itself was the astonishing fact that the mummies were blond haired and long nosed. So in 1993, Mair returned to collect DNA samples and test results to validate his hunch that the bodies were of European genetic stock. While Ancient Chinese texts from as early as the first millennium BC do describe groups of far-east dwelling Caucasian people, there is no mention of how or why these people ended up there.

7. Bermuda Triangle

The Bermuda triangle is an area of water in the North Atlantic Ocean in which a large number of planes and boats have gone missing in mysterious circumstances. It has been called 'The Triangle of Death', 'The Hoodoo Sea' and 'The Graveyard of Atlantic'. Over the years many explanations have been put forward for the disappearances, including bad weather, alien abductions, time warps, and suspension of the laws of physics. Although substantial documentation exists to show that many of the reports have been exaggerated, there is still no explanation for the unusually large number of disappearances in the area. The most famous victims of this triangle were the five Avengers of Flight 19. There were 14 men on board and entire squadron disappeared without a trace

6. The lost Roman Legion

After the Parthians of Persia defeated underachieving Roman General Crasuss' army, legend has it that a small band of POWs wandered through the desert and were eventually rounded up by the Hun military. First century Chinese historian Ban Gu wrote an account of confrontation with a strange army that fought in 'fish-scale formation' unique to Roman forces. An Oxford historian compared ancient records and claimed that the lost Roman legion founded a small town near the Gobi desert named Liqian, which in Chinese translates to Rome. The truth is yet to be known.

5. The Cliff Dwellings of the Anasazi

Little is known about why the AnasaziIndians began building these cliff dwellings. One thought is that they were being cannibalized by native Mexican tribes and subjugated. Another is that they were eating each other. Regardless of their peaceful existence (on the outside at least), as a predominantly agricultural culture established around 1200 BC, it is obvious that strife came to these peoples. The Mystery has been what kind of strife and to what extent. Nearly 700 years ago, they completely disappeared, and not in the usual way of a steady decline. There is evidence that their possessions were left behind, bodies were simply left in their dwelling to mummify and the entire culture simply vanished. Theories ranging from war, famine, drought and alien abduction have plagued this mystery for decades.

4. Marfa lights

The Marfa lights are unexplained lights (called ghost lights) that have been appearing on Mitchell Flat east of Marfa, Texas. The first published account of the lights was given in 1957, but Robert Reed Ellison (born 1880) reported them to his family and accounts of their appearances were spread by word of mouth. There are no verifiable written reports from before the 1950s. The lights are described as being the size of a basketball, floating in the air at around shoulder height. Colors are usually described as white, yellow, orange or red, but green and blue are sometimes reported.They usually travel laterally but have been seen to move rapidly in various directions. The lights sometimes appear in groups. Sightings are rare but there is a large amount of photographic and video evidence.Skeptics generally consider the lights to be related to traffic passing on the nearby US Route 67, or to be electric by-products of the predominantly quartz hills in the area.Because they usually appear in private property with terrain that is difficult to travel over, there are almost no reports of people being able to get close to the lights.

3. Mystery of the Sphinx

Some believe that the Sphinx is a combined form of woman and lion to recall and reveal the original construction of the zodiac as we know it now, under the sign of Virgo, 15,000 years ago when Virgo occupied the position of the First Sign for an ancient civilization. This could have been a period where men first mapped the stars. The Sphinx may be a monument that foretold something that began with the Virgin and ended with the Lion. It may also represent the two races of mankind, the heavenly man (created) and the counter part earthly man (animal man).

2. The Stone Spheres of Costa Rica

Workmen hacking and burning their way through the dense jungle of Costa Rica to clear an area for banana plantations in the 1930s stumbled upon some incredible objects: dozens of stone balls, many of which were perfectly spherical. They varied in size from as small as a tennis ball to an astonishing 8 feet in diameter and weighing 16 tons! Although the great stone balls are clearly man-made, it is unknown who made them, for what purpose and, most puzzling, how they achieved such spherical precision.

1. The Creation of Man

This is probably one of the most well known and controversial of mysteries known to man at the moment. The basic mystery is where did we come from? Many people believe we were created by some kind of God, others believe were naturally came into being through the process of evolution, and some even believe we were put onto earth by aliens. Because there is no conclusive evidence for either argument, this subject remains our greatest mystery. The concept of evolution states that through a series of adaptations and mutations from generation to generation, a creature can change dramatically over time.

P.S: best way to know what really happened is towait until you die. Then if you don't go to heaven, whole God thing is B.S. And it leaves between aliens and evolution. Of course then it's too bad you can't announce your discovery when you're dead. So pretty much, keep your beliefs about creation to yourself :D.